Year-2018http://repository.iiitd.edu.in/xmlui/handle/123456789/655
Thu, 21 Mar 2019 20:43:41 GMT2019-03-21T20:43:41ZDesigning dual band impedance matching transformer.http://repository.iiitd.edu.in/xmlui/handle/123456789/700
Designing dual band impedance matching transformer.
Singh, Vikas Vikram; HasmiI, M. S. (Advisor)
Wed, 18 Apr 2018 00:00:00 GMThttp://repository.iiitd.edu.in/xmlui/handle/123456789/7002018-04-18T00:00:00ZChipless RFID systemshttp://repository.iiitd.edu.in/xmlui/handle/123456789/697
Chipless RFID systems
Ummalaneni, Vahini; Hashmi, Mohammad (Advisor)
In the course of this BTP,low cost chipless RFID tags have been designed. The
proposed RFID tags are fully passive devices. They do not require chip assembly or any
power supply. In the previous semester, the tag studied had the information encoded in
the tag as impedance discontinuities along a matched transmission line. In this work,
The RFID system designed is based on pulse position modulation using Group delayed
Engineered microwave C-sections.These do not require any external components like
capacitance which the previously designed system used, thus reducing the cost and
simplifying the design. This design uses microstrip transmission lines cascaded to give
various group delay structures. The input signal is modulated at a frequency and sent to
the tag and the time-delayed response gives the information encoded based on the delay threshold set by the tag designer.
Tue, 18 Apr 2017 00:00:00 GMThttp://repository.iiitd.edu.in/xmlui/handle/123456789/6972017-04-18T00:00:00ZDigital cryptomarketshttp://repository.iiitd.edu.in/xmlui/handle/123456789/696
Digital cryptomarkets
Agrawaal, Taneea S; Kumaraguru, Ponnurangam (Advisor)
Darknet markets, also known as cryptomarkets, are websites located on the Darknet and designed to allow the traffcking of illicit products, mainly drugs. Over the past decade, online
advertising became the principal economic force behind many an Internet service, from major
search engines to globe-spanning social networks to blogs. There is often a tension between
online advertising and user experience, but on the other hand, advertising revenue enables a
myriad of free Web services to the public and fosters a great deal of innovation. We make use
of a public dataset made available in 2016 consisting of a collection of 89 black markets and 37
darknet forums to conduct various elementary experiments done to derive basic characteristics
such as anonymity, vendor-product relationships from the data. With the emergence of computational advertising - which strives to make online advertising integral to the user experience,this paper focuses on various IR and Natural Language Processing techniques employed to study and analyze computational advertising and use of manipulative techniques on the dark net. Wediscuss the feature engineering required for such a large dataset in detail.
Fri, 07 Jul 2017 00:00:00 GMThttp://repository.iiitd.edu.in/xmlui/handle/123456789/6962017-07-07T00:00:00ZImaging using radarhttp://repository.iiitd.edu.in/xmlui/handle/123456789/685
Imaging using radar
IQBAL, MOHD SHOAIB; Ram, Shobha Sundar (Advisor)
Frontal radar imaging has been proposed as an alternate technology to cameras for through wall surveillance and law enforcement. Cameras cannot see through wall as optic frequencies do not penetrate walls. On the other hand, radar operating in micro-wave frequencies, below 10GHz, can penetrate walls. High resolution images need radars operating at very high carrier frequencies and a large number of radar antenna elements. But higher frequencies are heavily attenuated by walls. Also, high frequency hardware is both costly and complex. In this work, we present a report on a previously proposed solution for through-wall radar imaging of humans using a low carrier frequency radar with few antenna elements. The radar image is constructed of a human moving in radial direction with respect to the radar. When a human moves, different body parts give rise to distinct Doppler returns. The key feature of the method is to dynamically resolve multiple body parts of the human across three dimensions: Doppler, azimuth and elevation. The additional Doppler dimension enables the relaxation of the resolution in terms of the carrier frequency and the number of array elements across the other dimensions. The solution looks promising. However, it has only been validated with simulation data. In this report, we further study the possibility of using Walabot, a 3D RF imaging sensor, to construct a frontal radar images in line-of- sight conditions
Sat, 25 Nov 2017 00:00:00 GMThttp://repository.iiitd.edu.in/xmlui/handle/123456789/6852017-11-25T00:00:00Z